James mckenzie



(M0del.)

J. MCKENZIE STYLOGRAPHIG PEN.

No. 281,903. Patented July 24, 1883.

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separated from the reservoir-section.

- parts in each of the figures.

UNITED STATES PATENT OFFICE.

JAMES MCKENZIE, OF BROOKLYN, NEW V YORK.

STYLOGRAPHIC PEN.

SP'EQIFIGATION forming part of Letters Patent No. 281,903, dated July24;, 1883.

I Application filed November 27,1882. (ModeL) To all whom it mayconcern:

Be it known that I, JAMES MCKENZIE, of Brooklyn, in the county of Kings,and in the State of New York, have invented certain new and useful 1Improvements in Stylographic Pens; and I do hereby declare that thefollow ing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, making a part of thisspecification, in. which Figure 1 is a perspective view of my pen asarranged for the pocket. Fig. 2 is alike view of the same with itspoint-section and air-cap Fig. 3 is a perspective view of the needle,socket, plug, and spring separated from each other and from thepoint-section. Fig. 4. is a cen-.

tral longitudinal section of the pen complete,

and Fig. 5 is a like view of the point-section enlarged.

Letters of like name and kind refer to like The design of my inventionis to increase the efficiency of stylographic or reservoir pens; and itconsists in the construction, arrange ment, and combination of parts, ashereinafter described, and specifically pointed out in the claims. I V

In the annexed drawings, A represents the main or reservoir section ofmy pen, which has the usual cylindrical form, and is provided upon oneend with an external thread, a, for the reception of an air-cap, B, andwithin its opposite end has an internal screw-thread, a;

At the axial center of the section A is an airtube, 0, that has one end,which is open,fitted closely into and through the upper end of saidsection, in the usual manner, while its opposite end projects slightlybeyond the corresponding end of said section and is closed, as shown,the space around said tube being for the reception of ink. The cap B,when screwed down against the shoulder which terminates the screw-threada, prevents the admission of air through the upper end of said air-tube;but when said cap is slightly retracted, air will pass beneath its lowerend, and, through slots If, that are cut in the said threaded upper endof said section A, will enter said tube. Air is permitted to escape fromsaid tube into the interior of the pen through an opening, 0,

that is preferably placed at a little distance abovethe lower end of theformer.

A point-section, D, having the usual exterior form, is adapted to screwinto the lower threaded end of the reservoir-section A, and is providedwith the ordinary removable cap, E, for inclosing its point when not inuse. The point-section D is provided with the usual axial opening, butthe lower end of the main portion cl of said opening is madesemi-spherical, instead of square, as has heretofore been the custom.From the main opening dto the point of said section the needle-opening dis slightly tapering, its largest end being uppermost.

Fitted within the opening (2 of the pointsection D is a square block orsocket, F, which has such transverse dimensions as to cause it to bereadily placedwithin or removed from said opening, and has such lengthas to cause it to fill the space between the lower end of said openingand the lower end of the airtube 0. The socket F has a round axialopening, f, which extends from its upper end nearly to its lower end,and within the same is" an internal screw-thread. The lower end of theair-tube G is reduced in size, and such reduced part c fits into saidopening, and thereby insures the relative positions of said parts. Inconsequence of the square form of said socket, sufficientspace is leftbetween its sides and the sides of the opening (I of the pointsectionfor the downward passage of ink, while from the semi-spherical form ofthe lower end of said opening the corners only of said socket come intocontact therewith, and the ink flows freely beneath the latter and isdirected into the needle-opening d.

From the opening f of the socket F a small opening, f, extends throughthe lower end of said socket, and receives a needle, G, that, near itsupper end, is provided with a head oncollar, g, which nearly fills saidopening f laterally. Above said collar 9 is a reduced part, around orupon which is a spiral spring, H, that has alength considerably greaterthan the length of said reduced portion, and is confined between theshoulder which forms the lower end of the same and a plug, I, which isthreaded exteriorly and is screwed clownward within said threadedopening f, the ar- 7 for writing purposes.

rangement being such as to cause said needle I tube adapted at its lowerend to maintain the to be held with a yielding pressure at the lowerlimit of its 1notion,with said collar in engagement with the lower endof said openef- The opening (1 within the point-section D is slightlytapering, as before stated, and the needle G has a corresponding taper,so that when said needle is at the lower limit of its motion, with itspoint projecting slightly from the point of said section D, said opening(1 is practically closed and no ink can escape; but when said needle israised by contact of'its point with the surface being written upon,sufficient space will be left around the same for the passage of thenecessary quantity of ink The'pen "is now complete,and,when used in theordinary manner, furnishes a steady flow of ink while the reservoir issupplied. The needle is held at the exact axial center of the pen, andcannot be displaced therefrom while in use, but is perfectly free tomove longitudinally, as is necessary in order to permit ink to flow fromthe point. Said needle and its socket may be easily and quickly takenfrom or placed within the pen whenever necessary for the purpose ofcleaning the same.

Having thus fully set forth the nature and merits of my invention, whatI claim as new 1s 1. In combination with the needle-socket, the air andreservoir tubes, all so arranged that the end of the air-tube holds thesocket centrally in position, while its end rests against the bottom ofthe reservoir -tube, substan tially as and for the purpose set forth.

2. In combination with the movable needlesocket normally resting againstthe bottom of the reservoir-tube, the air-tube having its end adapted toenter the upper end of the socket and keep the same in a centralposition within the reservoir-tube, substantially as and for the purposeset forth.

3. In combination with the reservoir-tube having concave bottom, theneedle socket, square in cross section, normally resting against thebottom of the tube, and the air needle-socket in its proper. centralposition, substantially as and for the purpose set forth.

4. In a stylographic pen, the movable needle-socket centrally guidedwithin the reservoir-tube by the lower end of the air-tube, and providedwith a yielding needle and means for keeping the needle projected fromthe lower end of the socket, substantially as and for the purposedescribed.

5. In a stylographic pen, the needle-socket free to move longitudinallywithin the reservoir-t-ube, and carrying a yielding needle and a springadapted to press thereon to keep it projected from the socket,substantially as set forth.

6. The socket F, free to move up and down within the reservoir-tube, andhaving a square form eXteriorly, and provided with a round threadedaxial cavity, f, and a needle-opening, f, in combination with the needleG, having the collar 9 and reduced upper end, 9, the spring H, fittedover said reducedend, and the plug 1, fitted within said threadedopening f, substantially as and for the purpose shown.

7. In combination with the upper threaded end, a, of the section A,having the slots (6 cut through its wall, the cap 13, fitted over saidthreaded part and adapted to close communication with the air-tube O,substantially as and for the purpose set forth.

8. The hereinbefore described pen, consisting of the main section A, thecap B, the air-tube 0, having slots cut through its sides at its upperend, the point-section D, provid 7 ed with the openings d and d, thesocket F,

having the openings f and f, the needle G, provided with the collar 9and reduced end g, the spring H, and the plug I, all combined to operatesubstantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this23d day of September, 1882.

JAMES MCKENZIE.

Witnesses:

SAMUEL R. MURPHY, JACOB G. CARPENTER.

